Wrap-around extension in Sudbury

Which postcode districts around Sudbury do we cover for house extensions work?

Every Sudbury postcode district we draw in, the stock that dominates it and the authority that validates a house extensions there. Sudbury fees below are the statutory England rates for 2026, not house extensions estimates.

What changes about a house extensions in each part of Sudbury?

Roof pitch, wall build-up and plot depth change every few Sudbury streets, and each one changes what a house extensions can achieve at that address.

• Sudbury (HA0) — house extensions work in Sudbury means 1930s semi-detached. Sudbury is 1930s semi-detached. 1930s semis here have the deepest rear gardens in the area throughout HA0. Brent Council decides the Sudbury application, and Sudbury Town Tube anchors the Sudbury location plan.
• Near Sudbury: Cricklewood (NW2) — Edwardian terraces defines Cricklewood, where edwardian terraces set what a house extensions can do. Edwardian plots here are wider across NW2. Any Cricklewood house extensions is validated by Brent Council, with Cricklewood Broadway the usual Cricklewood reference point on the site plan.
• Near Sudbury: Wembley (HA0, HA9) — 1930s semi-detached, major regen defines Wembley, where 1930s semi-detached, new-build set what a house extensions can do. 1930s semis here have the deepest rear gardens in the area across HA0. Any Wembley house extensions is validated by Brent Council, with Wembley Stadium the usual Wembley reference point on the site plan.
• Near Sudbury: Kilburn (NW6) — house extensions work in Kilburn means victorian terraces, mansion blocks. Kilburn is Victorian terraces, mansion blocks. The side-return infill is the classic move on these Victorian terraces — 3 m of permitted development depth plus the width of the original side passage throughout NW6. Brent Council decides the Kilburn application, and Kilburn High Road anchors the Kilburn location plan.
• Near Sudbury: Queen's Park (NW6) — Edwardian villas, conservation defines Queen's Park, where edwardian villas set what a house extensions can do. Edwardian plots here are wider across NW6. Any Queen's Park house extensions is validated by Brent Council, with Queen's Park the usual Queen's Park reference point on the site plan.
• Near Sudbury: Harlesden (NW10) — a house extensions in Harlesden starts from victorian terraces, and Harlesden reads as Victorian terraces. The side-return infill is the classic move on these Victorian terraces — 3 m of permitted development depth plus the width of the original side passage in NW10. Brent Council assesses Harlesden house extensions against its own Harlesden character guidance, and the location plan we draw for Harlesden references Harlesden High Street.
• Near Sudbury: Mapesbury (NW2) — Edwardian conservation area defines Mapesbury, where edwardian villas and terraces set what a house extensions can do. Edwardian plots here are wider across NW2. Any Mapesbury house extensions is validated by Brent Council, with Mapesbury Conservation Area the usual Mapesbury reference point on the site plan.

How do conservation areas and Article 4 affect a house extensions in Sudbury?

Sudbury conservation designations: there are 22 across Brent Council, Kensal Green, Harlesden, Sudbury Court among them. Designation costs a Sudbury owner the permitted-development route: a house extensions then needs a £548 householder application over 8 weeks, in place of the £249 prior approval route that takes 6 weeks. Sudbury Court is the Sudbury designation that most often changes a house extensions design.

Article 4 and your Sudbury house extensions: Article 4 for HMO conversions in specific streets around Wembley and Harlesden. At a HA0 address that matters twice over, because Brent Council applies the direction unevenly across Sudbury — we read the Sudbury policies map for the exact HA0 address before quoting house extensions.

Sudbury housing stock: Edwardian villas in Queen's Park and Mapesbury; Victorian terraces in Kilburn and Harlesden; 1930s semi-detached in Wembley; post-war tower blocks in Church End. Highly diverse borough; Queen's Park and Mapesbury are heritage-controlled; Wembley is a major regeneration hub. Read that before choosing a house extensions route in Sudbury — construction, not postcode, sets what is achievable.

What happens if a Sudbury property sits on a boundary?

• Kensington and Chelsea — adjoining Sudbury, with 38 conservation areas centred on SW1. A house extensions on the far side of the Sudbury line is determined by RBKC Planning, so the Sudbury quote for house extensions is checked against Kensington and Chelsea guidance before it is issued.
• Hammersmith and Fulham — the Hammersmith and Fulham boundary runs against Brent, so a house extensions a street from Sudbury is decided by Hammersmith & Fulham Council instead. Hammersmith and Fulham runs 45 conservation areas across W6 and its neighbours, which is why house extensions priced for Sudbury are re-checked against Hammersmith and Fulham policy whenever the Sudbury address sits on that edge.
• Ealing — the Ealing boundary runs against Brent, so a house extensions a street from Sudbury is decided by Ealing Council instead. Ealing runs 30 conservation areas across W3 and its neighbours, which is why house extensions priced for Sudbury are re-checked against Ealing policy whenever the Sudbury address sits on that edge.
• Harrow — the Harrow boundary runs against Brent, so a house extensions a street from Sudbury is decided by Harrow Council instead. Harrow runs 29 conservation areas across HA1 and its neighbours, which is why house extensions priced for Sudbury are re-checked against Harrow policy whenever the Sudbury address sits on that edge.

Sources for this Sudbury house extensions page: borough policies maps and conservation-area registers (2025–26), Royal Mail postcode district boundaries, the Town and Country Planning (Fees for Applications) (England) Regulations, the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended, and the Party Wall etc. Act 1996.